? is how we learn to count when we’re young. We often refer to natural numbers as the “ counting numbers,” since ?1,\ 2,\ 3,\ 4,\ 5,\. So the set of whole numbers isĪnd within the set of whole numbers, we define a set called the natural numbers, which is only the set of all positive integers, without ?0?. Within the set of integer numbers is a set of numbers that we call whole numbers, which is made up of all positive integers, plus ?0?. They’re made up of all the numbers you normally think about, like ?0,\ 1,\ 2,\ 3,\ 4,\ 5,\. Real numbers are divided into rational numbers and irrational numbers, which include all positive and negative integers, 0, and all the fractional and decimal values in between (fractions, decimals, transcendental numbers, etc.). Integers are a special kind of rational number. Real numbers are one of the broadest categories of numbers. These are irrational roots like ?\sqrt2? and decimal numbers like ?\pi? that go on forever.Īgain, we’ll go into more detail about these later. Irrational numbers are all numbers that can’t be written as a fraction. ?ĭecimal numbers that terminate or repeat are also rational numbers and can look like this: Rational numbers are fractions, which look like this: Real numbers include rational numbers and irrational numbers.
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